Here is a document on testing MAF's.

Attached Files

BoschAMM-Spec_Testing.pdf (157.3 KB, 309 views)

That is a cool document but I am not sure how I would use it as a test procedure. To the OP: why do you want to test it?

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

Slow response, slight idle irregularity, gas milage not great, you have to hit the gas hard to get it going ...

wires, head-gasket, O2, cam position sensor, sparks are all new, ...not much more tuning to do on this engine? or am i missing something....

My engine has the HFM system, with the Bosch MAP sensor similar to No. 2 in the document, but with a round plug...

__________________
1993 300E, 2.8 M104 .....

Here is a thread that might help. I searched on "300E MAF", lots of hits.

http://www.peachparts.com/shopforum/showthread.php?t=222222

You might build or buy a code reader for that and see if there are codes.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra